U.S. Route 80 or U.S. Highway 80 (US 80) is a major east–west United States Numbered Highway in the Southern United States, much of which was once part of the early auto trail known as the Dixie Overland Highway. As the "0" in the route number indicates, it was originally a cross-country route, from the Pacific Ocean to the Atlantic Ocean. Its original western terminus was at Historic US 101 in San Diego, California. However, the entire segment west of Dallas, Texas, has been decommissioned in favor of various Interstate Highways and state highways. Currently, the highway's western terminus is at an interchange with Interstate 30 (I-30) on the Dallas–Mesquite, Texas city line. Its eastern terminus is in Tybee Island, Georgia near the Atlantic Ocean. Between Jonesville, Texas and Kewanee, Mississippi, US 80 runs parallel to or concurrently with Interstate 20. It also currently runs through Dallas, Texas; Shreveport, Louisiana; Jackson, Mississippi; Montgomery, Alabama; Columbus, Georgia; Macon, Georgia; and Savannah, Georgia.
U.S. Highway 175 (US 175) is a 111.0-mile (178.6 km) east-west United States Numbered Highway located completely within the state of Texas. It comes very close to meeting its parent route, US 75, but decommissioning and rerouting in Downtown Dallas leaves it short a couple of miles. Before the decommissioning of US 75 south of downtown Dallas in favor of Interstate 45 (I-45), US 175 met US 75. US 175's western terminus is in Dallas at I-45. The highway's eastern terminus is in Jacksonville at an intersection with US 69.
State Highway 310 is an 8.3-mile (13.4 km) north–south state highway located mostly within Dallas. It is a portion of the old route of U.S. Highway 75 (US 75) along the Central Expressway, which now ends in downtown Dallas. The road, located within Hutchins and South Dallas, has been replaced as the major through route by Interstate 45 (I-45). SH 310 is known as the South Central Expressway south of its intersection with Loop 12 and the S. M. Wright Freeway north of it.
State Highway 6 (SH 6) runs from the Red River, the Texas–Oklahoma state line, to northwest of Galveston, where it is known as the Old Galveston Highway. In Sugar Land and Missouri City, it is known as Alvin-Sugarland Road and runs perpendicular to Interstate 69/U.S. Highway 59 (I-69/US 59). In the Houston area, it runs north to Farm to Market Road 1960 (FM 1960), then northwest along USS 290 to Hempstead, and south to Westheimer Road and Addicks, and is known as Addicks Satsuma Road. In the Bryan–College Station area, it is known as the Earl Rudder Freeway. In Hearne, it is known as Market Street. In Calvert, it is known as Main Street. For most of its length, SH 6 is not a limited-access road. In 1997, the Texas Legislature designated SH 6 as the Texas Korean War Veterans Memorial Highway.
State Highway 46 is a 71.4-mile (114.9 km) state highway in the U.S. state of Texas that runs from SH 16 east of Bandera to the intersection of SH 123 and SH 123 Business just south of Seguin.
State Highway 20 is a 78.1-mile (125.7 km) highway maintained by the Texas Department of Transportation (TxDOT) that runs from New Mexico State Road 460 at the state line between Texas and New Mexico at Anthony in El Paso County to Interstate 10 at McNary in Hudspeth County. It largely follows a former alignment of U.S. Route 80. The route passes through the city of El Paso as well as suburban and rural farming communities along the Rio Grande. With the exception of a stretch north of central El Paso where the route crosses north of I-10, the route generally runs in a narrow belt between I-10 and the Rio Grande. The route has connections to every international border crossing with Mexico in the El Paso area and has important intersections with US 54, US 62, US 85, and US 180.
State Highway 183 is a state highway in the Dallas–Fort Worth metroplex in Texas. Its most heavily used section is designated Airport Freeway where it serves the southern entrance of Dallas–Fort Worth International Airport.
State Highway 114 is a state highway that runs from the Dallas-Fort Worth Metroplex westward across Texas to the state border with New Mexico, where it becomes New Mexico State Road 114, which eventually ends at Elida, New Mexico at US 70 / NM 330.
Loop 12 is a state highway that runs mostly within the city limits of Dallas, Texas. The western segment of the loop is named after General Walton Walker, who served and died in South Korea. During the 1950s and 1960s, Loop 12 was the outer beltway in the Dallas area, having since been supplanted by Interstate 635 (I-635), which is itself being supplanted by the President George Bush Turnpike. Loop 12 is, however, the only state highway in Dallas that forms a complete loop.
State Highway 31 runs from U.S. 84 northeast of Waco via Corsicana, Athens, Tyler, Kilgore to U.S. 80 in Longview.
State Highway 180 is a highway that runs through Tarrant County and Dallas County in Texas (USA) between Interstate 35W in Fort Worth, running east to Loop 12 in Dallas. From Loop 12 in Dallas to Interstate 35W in Fort Worth, State Highway 180 follows the old routing of U.S. Route 80. Signage still shows the part from Loop 12 to Beckley Blvd as SH-180 although it had been removed from the state system in 2014.
Belt Line Road is a loop road that traverses 92 miles (148 km) through 16 cities in Dallas County, Texas. Belt Line Road is the outer complete loop which encircles Dallas, in contrast with I-635 which forms a partial inner loop, Loop 12 which forms a complete inner loop, and President George Bush Turnpike, a partial outer loop.
U.S. Route 80 is a U.S. highway that begins in the state of Texas in Dallas at an interchange with I-30. US 80 runs in an east–west direction for most of its length from Dallas to Louisiana. Before the advent of the Interstate Highway System, US 80 through Texas was once a vital link in a major transcontinental highway with the national western terminus being in San Diego, California rather than Dallas. Since 1991, most of US 80 in Texas has been decommissioned in favor of I-10, I-20 and I-30 between the New Mexico state line and its current western terminus.
Numerous special routes of U.S. Route 67, all business routes, exist. One other route, formerly an alternate route in western Illinois, has since been downgraded to state Route 267.
All of the business loops within Texas are maintained by the Texas Department of Transportation (TxDOT). Interstate 20 (I-20) has 15 business loops in the state, all located in western Texas. Along I-20, TxDOT identifies each business route as Business Interstate 20 followed by an alphabetic suffix. Along Texas Interstates, the alphabetic suffixes on business route names ascend eastward and northward. There are gaps in the alphabetic values to allow for future system expansion. The alphabetic naming suffixes are included as small letters on the bottom of route shields.
A total of ten special routes of U.S. Route 80 exist or did exist in the past.
Northwest Highway is a major highway/road in the Dallas-Fort Worth Metroplex area of Texas. The highway was originally built as the route of State Highway 114 into Dallas. The road has been the site of major development for almost half a decade, especially in Dallas. The route is known as other names at various points. This includes Northwest Parkway and Northwest Drive in Mesquite.
State Highway Loop 390 is a state highway loop that forms a partial beltway around Marshall, Texas.
I-30 in Dallas 
I-635 in Mesquite 
US 80 in Sunnyvale 
